The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 07, 2023
Filed:
Jul. 08, 2021
Palo Alto Research Center Incorporated, Palo Alto, CA (US);
Patrick Yasuo Maeda, San Jose, CA (US);
Palo Alto Research Center Incorporated, Palo Alto, CA (US);
Abstract
A digitally controlled LED illuminator sheet that produces far-field illumination patterns or light field distributions that increase light utilization and application efficiency. A dynamic directional LEDs (or other kinds of solid-state light sources) sheet is positioned under each lenslet of a microlens array. Individual LED beam pointing direction depends on off-axis position relative to optical axis of lenslet. Individual beams from independent LEDs form illumination pixels at the illumination plane or within a volume space and can be modulated in intensity. Illumination pixels partially overlap in far-field illumination plane and illumination volume. Over a large illumination space many illumination pixels will partially superimposed on neighboring illumination pixels, with the overlap being in increments smaller than the size of a pixel. The LEDs can be digitally turned on or off and/or pulse width or amplitude modulated to produce far-field illumination patterns or light field distributions with spectral efficiency and efficacious intensity.